Parboil the konjac noodles in boiling water, then drain.
Julienne the carrot, onion, spinach, and bell pepper; briefly blanch the spinach.
Add cooking oil to a pan and stir-fry the onion, carrot, and bell pepper.
When the vegetables are cooked, add the konjac noodles and stir-fry together.
Season with soy sauce, minced garlic, and sesame oil.
Add the spinach, mix everything, and plate.